Chapter 6, Problem 6.47CU

For air flowing through a converging-diverging channel, sketch the variation of the air pressure as air accelerates in the converging section and decelerates in the diverging section.

Q2: Steam enters a converging-diverging nozzle operating at steady state with Pi=40 bar, T-400C, and a velocity of 10 m/s. The steam flows through the nozzle adiabatically and no significant change in elevation. At the exit, p:=1.5 MPa, and the velocity is 665 m/s. The mass flow rate is 2 kg/s. Determine the exit area of the nozzle, in (m²). also, drive the (T-V) diagram for the steam. י2kg-מ Insulation -15 bar -665 ms 40 bar - 400 "C -10 m's Control volume boundary

A Gas enters an engine cylinder with volumetric analysis as follows: Oxygen =12.5%, Carbon Dioxide = 13% and nitrogen =74.5%.at the beginning of expansion, the temperature is 550° C, then expands reversibly with final to initial volume ratio of 6:1. If the process follows PV^1.25 = C, Calculate the heat flow in kJ/kg

ANS COMPLETELY AND SURE

The O2 input conditions to a nozzle, which operates in steady state, are 60 bar, 300 K and 1 m/s. The gas expands isentropically at 30 bar. Determine the output speed in m/s. Assume that oxygen is described by the Peng-Robinson equation

Problem #1: Helium gas flows through a well-insulated nozzle at steady state. The temperature and velocity at the inlet are 550 °R and 150 ft/s, respectively. At the exit, the temperature is 400 °R and the pressure is 40 psi. The area of the exit is 0.0085 ft². Using the ideal gas model with k=1.67, and neglecting potential energy effects, determine the mass flow rate, in lbm/s through the nozzle.

Argon gas flows through a well-insulated nozzle at steady state. The temperature and velocity at the inlet are 550°R and 150 ft/s, respectively. At the exit, the temperature is 480°R and the pressure is 40 lbf/in². The area of the exit is 0.0085 ft². Use the ideal gas model with k = 1.67, and neglect potential energy effects. Determine the velocity at the exit, in ft/s, and the mass flow rate, in lb/s. Step 1 Determine the velocity at the exit, in ft/s. V₂ = i ft/s

Steam at a massflow rate of 10 kg/s at 5 MPa and 600 °C enters an insulated turbine operating at steady state and exits as saturated vapor (x = 1) at 56 kPa. Kinetic and potential energy effects are negligible. [7.5] a) Calculate the work output of the turbine. [5] b) Does the expansion process inside this particular turbine occur in a reversible or irreversible way ? Please briefly explain your reasoning. [5] d) Sketch the process path inside the turbine in a T-S diagram. Include the two-phase region in your diagram as well. [7.5] c) Calculate the isentropic efficiency of the turbine show linear interpolation

Q.6.A. Oxygen enters a nozzle with a negligible velocity at 440 K and 12 bar, and leaves at 1.9 bar. Determine the volumetric flow rate of the oxygen at the nozzle entrance if the nozzle exit area is 2.5 cm2 and the ratio of inlet temperature to the outlet equal 1.69. (Cy = 718 J/kg K and Cp = 1005 J/kg K)